90147847 has 2 divisors, whose sum is σ = 90147848. Its totient is φ = 90147846.

The previous prime is 90147817. The next prime is 90147857. The reversal of 90147847 is 74874109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90147847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90147817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45073923 + 45073924.

It is an arithmetic number, because the mean of its divisors is an integer number (45073924).

Almost surely, 2^90147847 is an apocalyptic number.

90147847 is a deficient number, since it is larger than the sum of its proper divisors (1).

90147847 is an equidigital number, since it uses as much as digits as its factorization.

90147847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 90147847 is about 9494.6220040610. The cubic root of 90147847 is about 448.3857338303.

It can be divided in two parts, 9014 and 7847, that added together give a palindrome (16861).

The spelling of 90147847 in words is "ninety million, one hundred forty-seven thousand, eight hundred forty-seven".